Figure 4.

Map of the Western Mediterranean region showing the isolation sites of Rhizobium sullae IS123^T and WSM1592. The dotted line encompasses sites where the host plant Hedysarum coronarium L. (Sulla coronaria Medik) is currently distributed, and includes areas where the plant has been attributed the status “native” (Algeria, Morocco, Tunisia, Spain), or “uncertain origin,” i.e., possibly introduced (Corsica, Sardinia, Continental Italy, Sicily, Lybia, Egypt). The plant is also naturalized or cropped in other areas, where it has been intentionally introduced, including the Balearic Islands, Portugal, former Yugoslavia, Malta, Lebanon, and Syria. Source of the distribution data: International Legume Database and Information Service (http://www.legumes-online.net/ildis/aweb/database.htm).